Combustion device



Dec. 30, 9 4. 1,520,710

E. J. GURREN COMBUSTION DEVICE Filed Auz. 1923 2 Sheets-Sheet 1 acne on n00 Dec. 30, 1 924.

1,520,710 E. J. GURREN COMBUSTION DEVICE Filed Auz. 29 1923 2 Sheets-Sheet 2 /7 Wye/77am idn dfid Jake 04) gar/"en,

Patented Dec. 30, 1924.

EDWARD JOSEPH GURREN, OF ST. LOUIfi, MISSOURI.

COMBUSTION DEVICE.

Application filed August 29, 1923.

To all whom it may concern:

Be it known that 'I, EDWARD JOSEPH GU11 BEN, a citizen of the United States, residing in the city of St. Louis, in the State of Missouri, have invented a new and useful Improvementin Combustion Devices, of which the following is a full, clear, and exact specification, reference being had to the accompanying drawings, which form a part thereof.

My invention relates to combustion devices and more particularly to combustion devices adapted to be installed in the coinbustion chamber of a furnace or boiler to more completely burn the volatile gases incident to combustion therein which ordinarily pass out of the combustion chamber and up the chimney unburned.

Heretofore when a fire was started in the combustion chamber or when a new supply of coal was puttherein a great amount of volatile gas was generated which, because of an insuificiency of free oxygen, would pass out of the combustion chamber and up the chimney unburned, thereby causing a great waste of heat since this volatile gas contained a high percentage of heat units. The generation of this volatile gas after the fire has been started in the combustion chamber may be obviated to some extent by feeding the coal therein in small quantities, but this procedure necessitates constant and expert stoking and therefore is not practical in ordinary use.

The objects of my invention are to provide in the combustion chamber of a furnace or boiler a combustion device which will bring about the more complete combustion of the volatile gases which ordinarily pass unburned into the outer air; to provide a combustion device whereby the gases of combustion when the oxygen content is high, are drawn from the combustion chamber into a storage tank from which they are later returned to the combustion chamber to assist in the combustion when the oxygen content in the combustion chamber is low; and to provide a combustiondevice for installation in the combustion chamber of a furnace or boiler which will permit feeding a comparatively large quantity of coal into said combustion chamber at a single stoking without the loss of heat due to allowing the volatile gases generated to pass up the chimney unburned.

In the draw ngs my inven i n. is shown. ar

Serial No. 659,907.

ranged in a simple furnace used for heating a vessel of water placed above the combustion chamber thereof. This simple form of furnace with my new and improved combustion device arranged therein is shown diagraniimatically for the sake of convenience; but I do not propose to limit my invention to use with this form of furnace since my device may be successfully in stalled in furnaces and boilers of any type.

My invention is fully shown in the accompanying drawings wherein similar letters are used to designate similar parts. Fig. 1 is a sectional elevation showing my device installed in a combustion chamber of a furnace and 2 is a view along the line 2-2 in Fig. 1.

Referring to the figures, the furnace shown is provided with a combustion chamber A having the grate B with the ash pit C therebeneath. The fire door D is arranged to permit feeding of coal into the combustion chamber. The vessel E adapted to be filled with water is positioned above the combustion chamber A, as shown in the figures. The horizontal flue F at the back of the combustion chamber leads into the chimney G. The flow through the flue F may be controlled by the damper H. The opening J is provided. to facilitate cleaning the flue H and the chimney G. My combustion device comprises the horizontal flow pipe K and the return pipe L. The flow pipe K is provided with the branches X having the tubes M with the slots N therein extending downwardly at the sides of p the combustion chamber A adjacent to the walls thereof. In like manner the return pipe L is provided with the branches O having the tubes P with. the perforations R therein extending downwardly adjacent the walls of the combustion chamber. The upper ends of the tubes M and P are maintained in place by means of the pins S as shown in Fig. 1. The flow pipe K, preferably, leads into the upper part of one end. of the storage tank T which is arranged outside of the combustion chamber, preferably high above the furnace, and the pipe K is provided. with the check valve U which allows the flow of gases only from the com bustion chamber to the tank T. The return pipe L is preferably connected to the tank T at the lowest part of the other end thereof, as shown in the drawings, and is pro- Yi h the eh ckval V which all s matici the flow of gases in said pipe from the tank T to the combustion chamber. Each of said pipes is provided with a manually operated damper W for controlling the flow of :gases therethrough The preferred operation of my combustion device is as follows:

The manually operated dampers in the pipes K and L are closed and fire is made in the combustion chamber A. in the ordinary way. When coal is fed into the furnace in comparatively large quantities there an insuflicient supply of oxygen so that smoke is formed and the volatile gases of combustion pass into the chimney unconsumed. The gases of combustion. at this time have a low oxygen content. After the fire has burned a short time the smoke usually disappears and the products of combustion passing from the furnace havea high oxygen content. When the smoke has virtually stopped the damper H inthe horizontal tine F. which had been previously opened. is closed until it is about in the position shown in Fig. 1, and the manually operated damper N in the flow pipe K is opened to allow the gases of combustion with their surplus of oxygen to pass through the flow pipe into the tank T. The gases of combustion are admitted to the flow pipe through the slots N provided in the tubes M of the branches X. In this way the tank T is filled with g'ases having a comparatively high oxygen content. When a fresh supply of coal is put on the tire the dampers W are adjusted so that there will. be a flow of gas having a high oxygen content from the tank into the furnacewhere there is an insufficient supply of oxygen, and the oxygen from the gases drawn from-the tank will aid in the combustion of the volatile gases in the furnace. Ordinarily the dampers W may be set so that the operation of the device will be entirely auto- The tank T will be filled between firing periods with products of combustion having a high oxygen content. and then when coa-liisfed into the furnace these gases will be discharged into the furnace where the oxygen contained in them will be intimately ,niiXed and mingled with the volatile gases passing off from the fresh coal andwill aid in the combustion of these volatile gases. The circulation of the products of combustion between the tank T and the combustion chamber is brought about by the relative position of these two members and it will be be filled with gases having a high oxygen content. These gases are hot and when discharged into the furnace will aid insupporting the combustion therein. I prefer to have t gases with high xy n content di charged into the combustion chamber through the small perforations shown in the drawings so that there will be amore complete mining of volatile gases and the gas from the tank.

I- do not propose to limit my invention to the exact details of construction shown in the drawings, since it can be readily seen that the shape and size of the flow pipe I; and the return pipe L, the branches X and O with the slots N and the perforations R,- respectively, therein, and the storage tank T,

may deviating. from the spirit of my invention.

vi hat I claim as new and desire to secure by Letters Patent, is:

1. In combination with a furnace having a combustion chamber therein, a ,tank,i"a flow pipe connecting said combustion chainher and said tank and adapted to cause the gases from said combustion chamber to. pass into said tank, and a return pipeconnecting said tank and said. combustion chamber and adapted to carry said gases from said tank back into said combustion chamber, thereby causing a circulation. of gases from said combust on chamber into and through said tank back to said combustion chamberyand means for preventing a. circulation of said gases in the reverse direction.

2. In combination with a furnace having a combustion chamber therein, a jtank a flow be varied within wide limits without pipe extending from said combustion chamher and entering saidtank above the median line thereof, a returnpipe extending from said tank below the median line thereof into said combustion chamber thereby forming a system of circulation causing a circulation of gases from said combustion chamber into ber and said tank and adapted to cause the gases from said combustion chamber to pass into said tank; and a ret'urn pipe connecting said tank and said combustion chamber and adapted to carry said gases from said tank back into sa d combust on chamber, thereby causing the c rculation of gases; from said combustion chamber into and through said tank back to said combustion chamber, and a check valve in each of said pipes for controlling the flow therethrough'.

4. The combination with a furnace having a combustion chamber therein, a tank a flow pipe extending from said combustion chamber and entering, one end of said tank, a return pipe extending from the other. end of said tank into said combustion chamber. a valve in each. of. said pipes forcontrolling e flaw he thr ghi Said fl W P P ing a plurality of openings for the admission of the gases of combustion from said combustion chamber and said return pipe having a plurality of openings for the emission of said gases into said combustion chamber, whereby a circulation of said gases is caused from said combustion chamber into and through said tank back into said combustion chamber.

5. In combination With a furnace having a combustion chamber therein, a tank, a flow pipe extending from said combustion chamber and entering one end of said tank above the median line thereof, a return pipe extending from the other end of said tank below the median line thereof into said combustion chamber, thereby causing a circulation of gases from said combustion chamher into and through said tank back to said combustion chamber, said flow pipe having a plurality of branches Within said combustion chamber and adjacent to the Walls thereof which branches have slots therein for the admission of gases to said flow pipes, said return pipe having a plurality of branches Within said combustion chamber and adjacent the Walls thereof which branches are provided With a plurality of perforations therein for the emission of gases from said return pipe, and a check valve and a manually operated valve in each of said pipes.

In Witness whereof I have signed my name to this specification.

EDWARD JOSEPH GURREN. 

